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JOINT DAUT-ICTP-OATS-SISSA COLLOQUIUM
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Speaker: Piero Madau (Univ. of California Observatories)

Title: Cold Dark Matter Substructure in Galaxy Halos

Date: Thursday, April 19th, 2007
Time: 16:00
Venue: Villa Bazzoni

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Abstract: Revealing the nature of dark matter is fundamental to cosmology and particle physics. It is a clear, unique prediction of cold dark matter (CDM) theories that galaxies are embedded in massive, extended halos teeming with self-bound substructure or ``subhalos''. In this talk I will present initial results from "Via Lactea", the highest resolution simulation to date of Galactic CDM substructure. It resolves a Milky Way-size host with over 200 million particles, ten times more than achieved previously. The wealth of substructure predicted by this simulation has implications for direct and indirect dark matter searches, stellar streams, disk heating, gravitational lensing, and the Local Group dwarf galaxy population (the "missing satellite problem").
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